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37 Chapter 3
3.5 Advanced Chipset Features
By choosing the Advanced Chipset Features option from the Initial Setup
Screen menu, the screen below will be displayed. This sample screen
contains the manufacturer’s default values for the PCA-6189, as shown in
Figure 3-4:
Figure 3.4: Advanced chipset features screen
3.5.1 DRAM Timing Selectable
This item allows you to control the DRAM speed. The selections are
Manual or By SPD.
3.5.2 CAS Latency Time
This controls the latency between DDR RAM read command and the
time that the data actually becomes available. Leave this on the default
setting. The options are 2 or 2.5.
3.5.3 Active to Precharge Delay
This item allows you to select the value in this field, depending on
whether the board has paged DRAMs or EDO (extended data output)
DRAMs. The choices are: 7, 6, and 5.
Note: DRAM default timings have been carefully cho-
sen and should ONLY be changed if data is
being lost. Please first contact technical sup-
port.